2

LM5166

SNVSA67B – DECEMBER 2016 – REVISED JUNE 2017

www.ti.com

Product Folder Links: LM5166

Submit Documentation Feedback

Copyright © 2016–2017, Texas Instruments Incorporated

Table of Contents

1

Features .................................................................. 1

2

Applications ........................................................... 1

3

Description ............................................................. 1

4

Revision History..................................................... 2

5

Pin Configuration and Functions ......................... 3

6

Specifications......................................................... 4

6.1

Absolute Maximum Ratings ...................................... 4

6.2

ESD Ratings.............................................................. 4

6.3

Recommended Operating Conditions ....................... 4

6.4

Thermal Information .................................................. 4

6.5

Electrical Characteristics........................................... 5

6.6

Switching Characteristics .......................................... 6

6.7

Typical Characteristics .............................................. 7

7

Detailed Description ............................................ 14

7.1

Overview ................................................................. 14

7.2

Functional Block Diagram ....................................... 14

7.3

Feature Description................................................. 15

7.4

Device Functional Modes........................................ 25

8

Applications and Implementation ...................... 26

8.1

Application Information............................................ 26

8.2

Typical Applications ................................................ 26

9

Power Supply Recommendations ...................... 44

10

Layout................................................................... 44

10.1

Layout Guidelines ................................................. 44

10.2

Layout Example .................................................... 46

11

Device and Documentation Support ................. 47

11.1

Device Support...................................................... 47

11.2

Documentation Support ........................................ 47

11.3

Receiving Notification of Documentation Updates 48

11.4

Community Resources.......................................... 48

11.5

Trademarks ........................................................... 48

11.6

Electrostatic Discharge Caution ............................ 48

11.7

Glossary ................................................................ 48

12

Mechanical, Packaging, and Orderable

Information ........................................................... 48

4 Revision History

Changes from Revision A (December 2016) to Revision B

Page

•

Updated data sheet text to the latest TI documentation and translations standards ............................................................ 1

•

Changed the language of WEBENCH list item; added additional content and links for WEBENCH in data sheet .............. 1

•

Added LM5166X and LM5166Y output versions to the data sheet........................................................................................ 1

•

Replaced the body size (NOM) column with output versions in the Device Information table............................................... 1

•

Changed the Typical COT Mode Application circuit to a fixed 5-V output ............................................................................. 1

•

Changed the EN absolute maximum voltage from (VVIN + 0.3 V) to 68 V ............................................................................ 4

•

Deleted note 5 under the Absolute Maximum Ratings table ................................................................................................. 4

•

Changed the EN max operating voltage from VVIN to 65 V ................................................................................................... 4

•

Removed note 2 under the Recommended Operating Conditions......................................................................................... 4

•

Changed the IFB maximum from: 100 nA to: 25 nA ............................................................................................................... 5

•

Added Figure 13 and Figure 14.............................................................................................................................................. 8

•

Modified the Functional Block Diagram graphic ................................................................................................................... 14

•

Changed RDSON1 to RDSON2 in Equation 3 ............................................................................................................................ 17

•

Updated Equation 12 ........................................................................................................................................................... 19

•

Added a link to TI Design TIDA-01395 to the Typical Applications section ......................................................................... 26

•

Changed Design 3 to a 3.3-V fixed output, LM5166Y.......................................................................................................... 35

•

Added a new part number to CIN ref description .................................................................................................................. 35

•

Added a new part number to LF ref description.................................................................................................................... 38

•

Added the Design 5: 12-V, 300-mA COT Converter Operating from 24-V or 48-V Input section to Typical Applications... 41

•

Changed the PCB Layout and PCB Layout Guidelines section names to Layout and Layout Guidelines .......................... 44

•

Added content to the Documentation Support section ......................................................................................................... 47

Changes from Original (December 2016) to Revision A

Page

•

Changed data sheet status from product preview to production data.................................................................................... 1